I feel that in usage, lyrical is the 'soft jazz' that is always done to sad, angsty, nostalgic or sweet songs. In usage, 'contemporary' usually means 'modern jazz' or 'new jazz' that is done to more of a variety of music.
The greatest integer function of a real number x is represented by f(x) = [x] or |_x_|. For all real numbers x, the greatest integer function returns the largest integer less than or equal to x. In other words, the greatest integer function rounds down a real number to the nearest integer.
Any two nonzero integers a and b have a greatest common divisor, which can be expressed as the smallest positive linear combination of a and b. Moreover, an integer is a linear combination of a and b if and only if it is a multiple of their greatest common divisor. The greatest common divisor of two numbers can be computed by using a procedure known as the Euclidean algorithm. First, note that if a 0 and b | a, then gcd(a,b) = |b|.